Prada America's Cup Sneakers

this is sorta out there considering this is HB but i really have no where else to go for advise.

i really like these sneakers for my 'grown man' look, you know, hitting up the higher end lounges, w.28th st. club/lounge scene for those who are from NYC

i checked them out at the prada store today on broadway and prince and really like them, but dislike the $325 factor. after checking online i found them to be about $150 however i do no trust the authenticity/genuineness...so here's my question

a- does anyone know a site online to get legit prada sneakers for cheaper than MSRP?

b- can anyone point out to me the key factors in recognizing a fake prada sneaker?

the way you should approach any high priced item is that on the whole is this an item with good longevitiy relative to price... you'll most likely be able to wear Cup's tomorrow, next month, and 5 years from now without looking out of place in my opinion. Think of it as an investment.

Everything they said is true. But, something I found out about pradas in general maybe you guys already konw is, you can get older ones DS for less. They're different materials and colors but still hot and less money.